The purpose of graphs is to organise, summarise and display data. The different types of graphs are line graphs, bar graphs, and circle graphs. The steps involved in preparing graphs are:
1. Define events and data: Just like the cheek sheet it is important to determine the information that will be addressed in the graph.
2. Design the graph: Considering the data and the audience of the graph choose the type of graph to be used.
3. Collect data if this has not been done: A check sheet will help in this step. Data may be collected incrementally and cumulatively over time.
4. Enter data: Prepare the graph by entering data.
Project financial information can be reported using a line graph. The line graph in figure shows how project expenditures are progressing over time in relation to the project budget.
Figure : Line Graph
A bar graph displays data as vertical or horizontal bars. It shows data over time or data at a single point in time. Figure shows a bar graph that displays project budget and expense data by quarter for a twelve month period.
Figure : Bar graph
A circle graph or Pie chart is also known as pie chart is used for displaying data when the data elements and the whole are more important than showing data over time. Figure 4.4 shows employees in an Organisation according to education level.
Figure : Pie Chart